James t



(No-Model.)

J.-T. CLARK;

Y NUT LomiI N0. 357,467.' Patented Feb. 8, 1887.

lmmmm l .dttarney INVEWTUR 'Ntra JAMES T. CLARK, oE DENVER, coLoEAno.`

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 357,467, dated February8, 1887.

Application tiled August 13, 1886. Serial No. 210,775. (No model.)

To aZZ whom t may concern:

YBe it known that I, JAMES T. CLARK, of Denver, in the county ofArapahoe and State of Colorado, have invented certain new and usefulImprovements in Nut-Locks; and Ldo hereby declare that the following isa full, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form part of this speciiicatiominwhich- Figure l is a sideelevation of a section of railroad-track having my invention applied.Fig. 2 is a horizontal section on line x x, Fig. 1. Fig.l 3 is atransverse vertical section on line y y, Fig. l; and Fig. 4 isaperspective view of the lockingwasherdetached.

This invention relates to improvements in nut-locks, its' objectbeing'to make a simple and effective device of the kind; and itconsists, essentially, in the combination of a washer of peculiarconstruction with a bolt and nut, and one or more fish-rails providedwith elongated bolt-slots. washer is hereinafter described, illustratedin the drawings, and pointed outin the appended claims.

In the accompanying drawings the adjacent or meeting ends of two T-rails are desig' hated A A, and B B are two similar` iishplatesconnecting said ends and lying between the heads and flanges of therails, on oppositeA sides thereof.

. a a are bolt-holes in the webs of the rails, at suitable distancesfrom the ends thereof, and b b are elongated bolt holes or slots in theopposite fish-plates. The said bolt-slots Z correspond in position withthe holes a, so that a bolt, O, can pass through the web of the rail andthe two fish-plates B B', with its head resting against the outersurface of the latter; and c is a nut engaging the threaded end of saidbolt to the outer side of the plate B.

D is awasher lying between the nut c and the sh-plate B. The said washeris made of of plate metal, and is provided with the central circularopening', d, for the passage ofthe bolt C. The opposite ends of thewasher are upturned, so as to form the anges d d,which stand at rightangles to the body of the washer The Vconstruction, of said the bolt thewasher will turn therewith, andY that the spring-detents dl will rideover the edges of the bolt-slot in the iish-plate B, so

as not to prevent the rotation of the washer f and nut, but should thenut start to unscrew, and consequently carry the washer with it by meansof the flanges d d', the points of the spring-detents will engageagainst the edges of the said bolt-slot and prevent the disengagement ofthe nut The spring-detents are the quarter of the circumference of theopening d apart, so that the nut cannot make more than aquarter-rotation without one of the spring-detents impinging against theedge of the bolt-slot.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1; The combination,with the rails provided with suitable bolt-openingsand the rail bolts and nuts of ordinary construction, of a fishplateprovided with the bolt-openings correA spending in position with thoseof the rails, and the washers each provided with a central opening for abolt, outstanding flanges to clasp the two opposite sides of a nut, andone or more inwardly-standing spring-detents to impinge against the edgeof the corresponding bolt-opening in the fish-plate to stop the outwardmovement of the washer, and consequently the unscrewing of the nut.

2. The combination, with the rails A, having the bolt-openings a, thebolts C, and the nuts c, of the fish-plates B B', each provided with theelongated bolt-slots b b, and the washers D, each provided with thecentral circular bolt-opening, d, and the two spring-'de`1 tents dz d2,standing on the edge of said open- In testimony that I claim theforegoing as ings :L quarter of its circumference apart, and my own Iaffix my signature in presence of having two of its opposite ends turnedouttwo Witnesses. Wardly to lit snugly against two opposite sides 5 ofthe corresponding nut, all parts constructed JAMES T. CLARK.

XVitnesses:

and arranged substantially sis-shown and de- H. XV. HAMMON, JOSEPHMILNER.

described7 for the purpose specified.

